Because H₂ Levels in Oxic Environments Are Transient, It Is

question 69

True/False

Because H₂ levels in oxic environments are transient, it is likely that aerobic hydrogen bacteria shift between chemoorganotrophy and chemolithotrophy depending on levels of organic compounds and hydrogen in their habitats.

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Definitions:

Placoid Scales

The toothlike scales found in sharks and other cartilaginous fishes.

Cartilaginous Fishes

A class of fishes that have skeletons made entirely out of cartilage, rather than bone.

Jawless Fishes

A group of fish that lack a true jaw, represented by modern lampreys and hagfishes, belonging to the superclass Agnatha.

Myxini

A class of jawless marine animals known as hagfishes, characterized by their slimy skin and primitive features.